Milltek Ford Focus MK4 ST 2.3 EcoBoost Non-Res GPF/OPF Bypass Pipe | SSXFD313
Milltek Sport Ford Focus MK4 ST Non-Resonated GPF/OPF Bypass – SSXFD313
Unlock a louder, more aggressive exhaust sound from your Ford Focus MK4 ST with the Milltek Sport Non-Resonated GPF/OPF Bypass Pipe.
Designed for the Ford Focus MK4 ST 2.3 EcoBoost, this premium stainless steel exhaust upgrade replaces the factory-fitted Gasoline Particulate Filter (GPF/OPF), reducing exhaust restriction and delivering a more pronounced, sporty exhaust note.
Manufactured in the UK by Milltek Sport, this non-resonated bypass pipe is engineered for performance enthusiasts looking to enhance exhaust sound and support a Stage 2 tuned setup.
Key Features & Benefits
Louder Exhaust Note: Non-resonated design delivers a deeper, more aggressive exhaust sound.
Improved Exhaust Flow: Removes the restriction created by the factory GPF/OPF.
Premium Stainless Steel: High-quality construction for durability and corrosion resistance.
Designed for OE Exhaust: Specifically engineered to connect to the original factory cat-back exhaust system.
Performance Upgrade: Ideal for supporting Stage 2 ECU tuning and motorsport applications.
UK Manufactured: Designed and produced by Milltek Sport.
Vehicle Compatibility
Ford Focus MK4 ST 2.3 EcoBoost Estate / Wagon – 2019 onwards
Ford Focus MK4 ST 2.3 EcoBoost Hatchback – 2019 onwards
Suitable for GPF/OPF-equipped petrol models only.
Product Specifications
Manufacturer: Milltek Sport
Product Code: SSXFD313
Product Type: GPF/OPF Bypass Pipe
Design: Non-Resonated (Louder)
Pipe Diameter: 76.2mm (3")
Material: Stainless Steel
Exhaust Compatibility: Original Equipment (OE) Cat-Back
EC Approved: No
ECU Requirements: Stage 2 Remap Required
Important Fitment & Usage Information
This product is designed for fitment to the original factory cat-back exhaust, not the Milltek Sport cat-back system. A Stage 2 ECU remap is required.
Motorsport / Off-Road Use Only: This bypass removes factory emissions-control equipment and is not legal for use on UK public roads. Installation on a road-going vehicle may result in MOT failure.
Why Choose OC Motorsport?
At OC Motorsport in Battlesbridge, Essex, we specialise in Ford performance upgrades, exhaust systems, vehicle tuning and professional ECU remapping.
Whether you're developing a track-focused Focus ST or upgrading your vehicle's performance hardware, our experienced team can help you select the correct components for your build.
Contact OC Motorsport for product enquiries, compatibility advice and professional installation information.


